Neurotuberculosis is represented by different and possibly concomitant forms, of which the most frequent are tuberculous meningitis and parenchymal tuberculosis followed by cerebral miliary tuberculosis and the extremely rare tuberculous abscesses. Tuberculous meningitis is characterized by the presence of inflammatory meningeal exudate involving meningeal surfaces and CSF spaces with involvement of relative vascular and nervous structures. Most frequent complications are parenchymal infarction, hydrocephalus and mycotic aneurysms. Inflammatory meningeal exudate shows intense contrast enhancement. Parenchymal tuberculosis may directly involve the cerebral and/or medullary parenchyma as areas of cerebritis/myelitis with solid nodular lesions (tuberculomas) with a central area of caseating necrosis. Tuberculomas are characterized by intense nodular or ring enhancement.
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